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llvm-mirror/docs
Peter Collingbourne a2d4395226 IR, X86: Understand !absolute_symbol metadata on global variables.
Summary:
Attaching !absolute_symbol to a global variable does two things:
1) Marks it as an absolute symbol reference.
2) Specifies the value range of that symbol's address.
Teach the X86 backend to allow absolute symbols to appear in place of
immediates by extending the relocImm and mov64imm32 matchers. Start using
relocImm in more places where it is legal.

As previously proposed on llvm-dev:
http://lists.llvm.org/pipermail/llvm-dev/2016-October/105800.html

Differential Revision: https://reviews.llvm.org/D25878

llvm-svn: 289087
2016-12-08 19:01:00 +00:00
..
_ocamldoc
_static Fix some typos in the doc 2016-08-28 20:29:18 +00:00
_templates
_themes/llvm-theme
CommandGuide [llvm-cov] Add support for loading coverage from multiple objects 2016-10-25 17:40:55 +00:00
Frontend
HistoricalNotes
PDB Add documentation for the PDB Module Info stream. 2016-11-29 22:14:56 +00:00
Proposals [doc] use double `` to prevent html output of merging double dash 2016-10-17 19:23:19 +00:00
TableGen [Docs][TableGen] Remove reference to tablegen supporting octal integers. It doesn't and hasn't for at least 9 years. 2016-11-18 02:28:50 +00:00
tutorial [Docs] Fix a broken link in the Kaleidoscope tutorial. 2016-09-13 06:31:37 +00:00
AdvancedBuilds.rst
AliasAnalysis.rst [Docs] Add initial MemorySSA documentation. 2016-08-17 00:17:29 +00:00
AMDGPUUsage.rst AMDGPU: Improve documentation. 2016-09-20 09:04:51 +00:00
ARM-BE-bitcastfail.png
ARM-BE-bitcastsuccess.png
ARM-BE-ld1.png
ARM-BE-ldr.png
Atomics.rst fix some various typos in the doc 2016-07-02 19:28:40 +00:00
BigEndianNEON.rst
BitCodeFormat.rst [docs] Update some obsolete information in BitCodeFormat docs. 2016-10-14 16:23:09 +00:00
BlockFrequencyTerminology.rst
BranchWeightMetadata.rst This code block breaks the docs build (http://lab.llvm.org:8011/builders/llvm-sphinx-docs/builds/11925/steps/docs-llvm-html/logs/stdio). Setting the code highlighting to none instead of llvm. 2016-07-19 23:50:11 +00:00
Bugpoint.rst
CMake.rst Add experimental support for unofficial monorepo-like directory layout 2016-11-07 22:13:38 +00:00
CMakeLists.txt [cmake] Support overriding remaining HTML doc install directories 2016-09-27 19:52:29 +00:00
CMakePrimer.rst [docs] fix cmake code-block warning 2016-07-20 09:47:09 +00:00
CodeGenerator.rst [Support/ELF/AMDGPU] Add 32-bit lo/hi got and pc relative relocations 2016-10-14 04:03:49 +00:00
CodeOfConduct.rst [Conduct] Refine what "rare cases" means wrt violations outside our spaces. 2016-07-06 19:32:41 +00:00
CodingStandards.rst Update docs to reflect new minimum MSVC version requirement 2016-10-19 23:04:41 +00:00
CommandLine.rst Update CommandLine.rst getRegisteredOptions example 2016-11-07 02:43:01 +00:00
CompileCudaWithLLVM.rst [CUDA] Note in docs that you need to build with -lcudart on MacOS 2016-11-22 23:13:29 +00:00
CompilerWriterInfo.rst [docs] fix link to AMD manuals (PR30946) 2016-11-08 16:49:24 +00:00
conf.py Fix some typos in the doc 2016-08-28 20:29:18 +00:00
Coroutines.rst Changing a code block to text because Sphinx does not like it on the builder (http://lab.llvm.org:8011/builders/llvm-sphinx-docs/builds/12517/steps/docs-llvm-html/logs/stdio) 2016-08-31 14:37:20 +00:00
CoverageMappingFormat.rst Removes a warning about duplicate label named _strings from CommandLine.rst. 2016-07-23 18:52:21 +00:00
DebuggingJITedCode.rst
DeveloperPolicy.rst wordsmith the "new targets" section a bit. 2016-08-17 22:17:03 +00:00
doxygen-mainpage.dox
doxygen.cfg.in Fix some typos in the doc 2016-08-28 20:29:18 +00:00
Dummy.html
ExceptionHandling.rst [docs] Fixing Sphinx warnings to unclog the buildbot 2016-07-20 12:16:38 +00:00
ExtendedIntegerResults.txt
ExtendingLLVM.rst
Extensions.rst Revert "[CodeGen] Fix invalid DWARF info on Win64" 2016-12-08 01:56:23 +00:00
FAQ.rst fix some typos in the doc 2016-07-28 09:28:58 +00:00
FaultMaps.rst
GarbageCollection.rst Tidy up example of getting the pointer size. 2016-10-14 05:45:46 +00:00
gcc-loops.png
GetElementPtr.rst [docs] Fixing Sphinx warnings to unclog the buildbot 2016-07-20 12:16:38 +00:00
GettingStarted.rst [doc] Add .arcconfig setup to the "how to work with a monorepo" section 2016-12-03 01:04:40 +00:00
GettingStartedVS.rst [doc] Remove explicit CMake version requirement for MSVC 2016-11-09 01:44:42 +00:00
GlobalISel.rst [docs] Add initial Global ISel documentation. 2016-11-04 17:57:34 +00:00
GoldPlugin.rst Revert 'Test commit as per developer policy' 2016-11-30 08:24:43 +00:00
HowToAddABuilder.rst [docs] Fix a broken URL in 'HowToAddABuilder' 2016-09-29 13:29:49 +00:00
HowToBuildOnARM.rst
HowToCrossCompileLLVM.rst [docs] Fix unexpected indentation in HowToCrossCompileLLVM.rst 2016-05-10 14:02:46 +00:00
HowToReleaseLLVM.rst Adding RELEASE_TESTERS.TXT 2016-07-21 16:46:44 +00:00
HowToSetUpLLVMStyleRTTI.rst
HowToSubmitABug.rst
HowToUseAttributes.rst
HowToUseInstrMappings.rst [docs] Fixing Sphinx warnings to unclog the buildbot 2016-07-20 12:16:38 +00:00
InAlloca.rst [docs] Fixing Sphinx warnings to unclog the buildbot 2016-07-20 12:16:38 +00:00
index.rst [PDB] Begin adding documentation for the PDB file format. 2016-11-10 19:24:21 +00:00
LangRef.rst IR, X86: Understand !absolute_symbol metadata on global variables. 2016-12-08 19:01:00 +00:00
Lexicon.rst [docs] Add PR to Lexicon 2016-10-06 16:39:22 +00:00
LibFuzzer.rst [libFuzzer] better documentation for -fsanitize-coverage=trace-cmp 2016-11-17 17:31:54 +00:00
LinkTimeOptimization.rst [docs] Typos and whitespace fixed in LTO docs. 2016-11-29 18:00:31 +00:00
linpack-pc.png
LLVMBuild.rst
LLVMBuild.txt
make.bat
Makefile.sphinx
MarkedUpDisassembly.rst [docs] Fixing Sphinx warnings to unclog the buildbot 2016-07-20 12:16:38 +00:00
MCJIT-creation.png
MCJIT-dyld-load.png
MCJIT-engine-builder.png
MCJIT-load-object.png
MCJIT-load.png
MCJIT-resolve-relocations.png
MCJITDesignAndImplementation.rst
MemorySSA.rst Fix some typos in the doc 2016-08-28 20:29:18 +00:00
MergeFunctions.rst [docs] Fixing Sphinx warnings to unclog the buildbot 2016-07-20 12:16:38 +00:00
MIRLangRef.rst [docs] Fixing Sphinx warnings to unclog the buildbot 2016-07-20 12:16:38 +00:00
NVPTXUsage.rst [docs] Fixing Sphinx warnings to unclog the buildbot 2016-07-20 12:16:38 +00:00
OptBisect.rst Adding document describing the use of the -opt-bisect-limit option. 2016-08-26 23:11:48 +00:00
Packaging.rst
Passes.rst Remove the ScalarReplAggregates pass 2016-06-15 00:19:09 +00:00
Phabricator.rst
ProgrammersManual.rst IR: Move NumElements field from {Array,Vector}Type to SequentialType. 2016-12-02 03:20:58 +00:00
Projects.rst
re_format.7
README.txt
ReleaseNotes.rst Timer: Track name and description. 2016-11-18 19:43:18 +00:00
ReleaseProcess.rst
ReportingGuide.rst fix some various typos in the doc 2016-07-02 19:28:40 +00:00
ScudoHardenedAllocator.rst [scudo] Documentation update for Scudo, from https://reviews.llvm.org/D23332 2016-08-09 23:57:04 +00:00
SegmentedStacks.rst [docs] Fixing Sphinx warnings to unclog the buildbot 2016-07-20 12:16:38 +00:00
SourceLevelDebugging.rst [docs] Fix some typos. NFC. 2016-11-01 23:55:50 +00:00
SphinxQuickstartTemplate.rst
StackMaps.rst [Stackmap] Added callsite counts to emitted function information. 2016-09-14 20:22:03 +00:00
Statepoints.rst [docs] Fixing Sphinx warnings to unclog the buildbot 2016-07-20 12:16:38 +00:00
SystemLibrary.rst
TableGenFundamentals.rst
TestingGuide.rst Review fixes to lit documentation 2016-07-12 20:59:17 +00:00
TestSuiteMakefileGuide.rst
TypeMetadata.rst IR: New representation for CFI and virtual call optimization pass metadata. 2016-06-24 21:21:32 +00:00
Vectorizers.rst
WritingAnLLVMBackend.rst Move the global variables representing each Target behind accessor function 2016-10-09 23:00:34 +00:00
WritingAnLLVMPass.rst [docs] Make WritingAnLLVMPass.rst up-to-date with current state of things 2016-09-27 12:07:21 +00:00
XRay.rst [XRay][docs] Define requirements on installed log handlers. 2016-11-16 02:18:23 +00:00
yaml2obj.rst
YamlIO.rst

LLVM Documentation
==================

LLVM's documentation is written in reStructuredText, a lightweight
plaintext markup language (file extension `.rst`). While the
reStructuredText documentation should be quite readable in source form, it
is mostly meant to be processed by the Sphinx documentation generation
system to create HTML pages which are hosted on <http://llvm.org/docs/> and
updated after every commit. Manpage output is also supported, see below.

If you instead would like to generate and view the HTML locally, install
Sphinx <http://sphinx-doc.org/> and then do:

    cd <build-dir>
    cmake -DLLVM_ENABLE_SPHINX=true -DSPHINX_OUTPUT_HTML=true <src-dir>
    make -j3 docs-llvm-html
    $BROWSER <build-dir>/docs//html/index.html

The mapping between reStructuredText files and generated documentation is
`docs/Foo.rst` <-> `<build-dir>/docs//html/Foo.html` <-> `http://llvm.org/docs/Foo.html`.

If you are interested in writing new documentation, you will want to read
`SphinxQuickstartTemplate.rst` which will get you writing documentation
very fast and includes examples of the most important reStructuredText
markup syntax.

Manpage Output
===============

Building the manpages is similar to building the HTML documentation. The
primary difference is to use the `man` makefile target, instead of the
default (which is `html`). Sphinx then produces the man pages in the
directory `<build-dir>/docs/man/`.

    cd <build-dir>
    cmake -DLLVM_ENABLE_SPHINX=true -DSPHINX_OUTPUT_MAN=true <src-dir>
    make -j3 docs-llvm-man
    man -l >build-dir>/docs/man/FileCheck.1

The correspondence between .rst files and man pages is
`docs/CommandGuide/Foo.rst` <-> `<build-dir>/docs//man/Foo.1`.
These .rst files are also included during HTML generation so they are also
viewable online (as noted above) at e.g.
`http://llvm.org/docs/CommandGuide/Foo.html`.

Checking links
==============

The reachability of external links in the documentation can be checked by
running:

    cd docs/
    make -f Makefile.sphinx linkcheck